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Current hot questions on the s process in AGB stars
(2016-01-05)
Asymptotic giant branch (AGB) stars are a main site of production of nuclei heavier than iron via the s process. In massive (>4 M⊙) AGB stars the operation of the 22Ne neutron source appears to be confirmed by observations ...
Investigation of Alpha-Induced Reactions on 107Ag at Astrophysical Energies
(2016-01-05)
Cross sections of the 107Ag(α, γ)111In and 107Ag(α,n)110In reactions have been measured with the activation method at effective center-of-mass energies between 7.79 MeV and 12.00 MeV close to the astrophysical energy range. ...
Cross section measurements for γ-process studies using a LEPS detector
(2016-01-05)
In this paper we present the ongoing experiments at ATOMKI related to our systematic γ-process studies. These studies are intended to enlarge the limited experimental database from α-induced reactions on nuclei in the ...
Revision of the derivation of stellar rates from experiment and impact on Eu s-process contributions
(2016-01-05)
A new, general formalism to include experimental data in revised stellar rates is discussed, containing revised uncertainties. Application to the s-process shows that the actual uncertainties in the neutron capture rates ...
The Impact of Fission on R-Process Calculations
(2016-01-05)
We have performed r-process calculations in neutron star mergers (NSM) and jets of magnetohydrodynamically driven (MHD) supernovae. In these very neutron-rich environments the fission model of heavy nuclei has an impact ...
The new vertical neutron beam line at the CERN n-TOF facility design and outlook on the performance
(2015-11-01)
At the neutron time-of-flight facility n-TOF at CERN a new vertical beam line was constructed in 2014, in order to extend the experimental possibilities at this facility to an even wider range of challenging cross-section ...
The 106Cd(α, α)106Cd elastic scattering in a wide energy range for γ process studies
(2015-08-01)
Alpha elastic scattering angular distributions of the <sup>106</sup>Cd(α, α)<sup>106</sup>Cd reaction were measured at three energies around the Coulomb barrier to provide a sensitive test for the α + nucleus optical ...
The Role of Fission in Neutron Star Mergers and Its Impact on the r-Process Peaks
(2015-07-15)
Comparing observational abundance features with nucleosynthesis predictions of stellar evolution or explosion simulations, we can scrutinize two aspects: (a) the conditions in the astrophysical production site and (b) the ...
Integral cross section measurement of the 12C(n,p) 12B reaction
(CERN, 2015-06-19)
The integral cross section of the 12C(n, p) 12B reaction was measured at the neutron time of flight facility n-TOF at CERN, from the reaction threshold at 13.6 MeV up to 10 GeV, by means of the combined activation and a ...